<html>
  <head>
  <title></title>
<style>
  .gamma1 { foreground-image-transformation: contrast-brightness-gamma(0.5,0.5, 1.0); }
  .gamma2 { foreground-image-transformation: contrast-brightness-gamma(0.5,0.5, 2.0); }
  .gamma05 { foreground-image-transformation: contrast-brightness-gamma(0.5,0.5, 0.5); }
  .gamma025 { foreground-image-transformation: contrast-brightness-gamma(0.5,0.5, 0.25); }

</style>
<script type="text/tiscript"></script>
  </head>
<body>

  <p>See: <a href="http://en.wikipedia.org/wiki/Gamma_correction">http://en.wikipedia.org/wiki/Gamma_correction</a></p>

  &gamma; = 2  <picture.gamma2 src="images/from-wiki.png"  />
  Original, &gamma; = 1 <picture.gamma1 src="images/from-wiki.png" />
  &gamma; = 0.5 <picture.gamma05 src="images/from-wiki.png" />
  &gamma; = 0.25 <picture.gamma025 src="images/from-wiki.png" />
 
</body>
</html>
